Controller attachment.



J. SONTAG. CONTROLLER ATTAGHMENT.

rPLIo'ATIoN FILED 001:17. 190e.

Patented July 27, 1909.

Witwe/om 19 m UNITED srailrlsrirnnr orrion.

JOHN SONTAG, OF WEST NEW YORK, NEW JERSEY.

CONTROLLER ATTACHMENT.

Application filed October 17, 1998.

To all whom it may concern.:

Be it known that I, Jol-1N SoN'rAG, a citizen of the United States, residing at 1West New York, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Controller Attachments, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to improvements in insulating' the segments and fingers of a circuit controller, and has for its object to provide means to prevent the ends of the segments and fingers from being burned away by arcs being formed between them.

Other objects and advantages of this invention will appear in the course of the following specification.

In the accompanying drawing: Figure 1 is a front view of a circuit controller, with a part thereof broken away, Fig. 2 is a top plan view, partly in section, showing a finger and a segment with their supports, Fig. 3 is a longitudinal section through one of the fingers showing the insulating material secured in the end thereof: Fig. lis a similar view with brous material used as an insulating material; Fig. is a cross sectional view through one of the fingers; Fig. 6 is a perspective view of a portion of one of the segments; and Fig. 7 is a longitudinal section through the same on the line a2- of the Fig. (3. 1

Referring to the drawing, which illustrates the preferied form of my invention, (1) designates the controller box, which is provided with the usual door Suitably arranged within the controller boX is a stad or spindle (3), which carries a cylinder or sleeve (Ll) adapted to be rotated by said staff. To the cylinder (4) are secured in any suitablemanner a plurality of projections orlugs to which are removably secured the contact segments of copper or other goed conducting material.

Formed in one end of the contact face of said segment is a groove (7), the lower wall (S) of which is cut away, and as shown, does not project out as far as the upper wall (9). Leading into the groove, from the upper or concave side of the segment are apertures 10, 10, preferably two in number. Adapted to be introduced into the groove (7) is an insulating material (11), which may be either ber, glass or porcelain, or any other suitable material, which is preferably intro- Specification of Letters Patent.

Patented July 27, 1909.

Serial No. 458,268.

duced therein in a plastic state and so shaped as to give the end of the segment a curved or rounded fo 1m, or contour, as illustrated. Screws as (10a), (10a), are passed through the apertures (10), (10), and screwed into the insulating material, serving to aid in re taining the same in place.

rlhe contact fingers (12) are suitably secured to sheet metal fingers (13), which in turn are fastened to a support or finger bar (14). The contact face of the finger is provided with a recess or cut-out portion (15) into which open apertures (16), (16), pref erably two in number, leading from the lower or concave face thereof. An insulating material (17), which can be similar or different to that introduced into the groove (7) 4of the segment, is put into the recess (15), and screws (16a, 16a) are passed through the apertures (16, 16), and screwed into the insulating material to aid in maintaining the same in place. The insulation applied to the nger will also be rounded or curved, as shown. In Fig. 4t I have shown an insulating material of fibrous material, as (11a), secured in the recess (15) in the end of one of the contact ngers. This same kind of insulating material could be, of course, introduced into the grooves in the ends of the segments.

IVhen the handle (18) of the controller is moved to establish a current the segments (6) will be turned and the insulation carried by them will contact with the insulation of the fingers, and then, as the turning of the segments is continued the metal of the members will Contact. When the handle of the controller is turned to break the connection between the segments and the iingers, the segments will travel back and the insulated portions of the members will be the last to separate, and hence no arcing and consequent burning of the fingers and segments can result.

W'hat I claim is:

1; In an electric circuit controller, a contact linger having a contact face, the contact face of said finger being provided with a recess in the end thereof, and an insulating material secured in said recess.

2. In an electric circuit controller, a contact finger, the end of the contact surface of said finger being provided with a recess, and an insulating material secured in said recess, said insulation being rounded olf to conform to the contour of the end of said finger.

3. In an electric circuit controller, a contact linger, a portion of the end of the contact surface thereof having a recess, an insulating material insaid recess, and means adapted to aid in maintaining the insulating inaterial in position.

4L. ln an electric circuit controller, a contact segment provided with a contact face, said contact face having a groove, tlie Wall of said groove on the contact face side of said segment not projecting out as far as tlie Wall above it, and an insulating material secured in said groove, said insulating material being rounded off to conform to the contour of said contact face.

5. ln an electric circuit controller, a con; tact segment, said segment being provided with a groove, tlie Wall of said groove on the Contact surface side of said segment not projecting out as far as the Wall above it, an insulating material secured in said groove, and means adapted to aid in maintaining the insulating material in position.

ln testimony whereof l lereunto atliX my signature in presence of tivo Witnesses.

JOHN SN'EAG.

Witnesses J. Pl-iLrr Dirrnn, JOHN EDWARD DirrnL. 

